Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie os oponentes de Stanford.
 ###Tabelas: CREATE TABLE schedule (schedule_id AUTO_INCREMENT PRIMARY KEY, Game INT, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Black Knights points INT, Opponents INT, Record VARCHAR) CREATE TABLE doubles:_29_16_titles_13_runners-up (doubles:_29_16_titles_13_runners-up_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE 1910-1919 (1910-1919_id AUTO_INCREMENT PRIMARY KEY, number INT, date of debut VARCHAR, name VARCHAR, date of birth VARCHAR, number of caps INT, number of goals INT, date of death† VARCHAR) CREATE TABLE africa (africa_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Country VARCHAR, International tourist arrivals (2011) VARCHAR, International tourist arrivals (2010) VARCHAR, Change (2010 to 2011) VARCHAR, Change (2009 to 2010) VARCHAR) CREATE TABLE list_of_titleholders_and_runners-up (list_of_titleholders_and_runners-up_id AUTO_INCREMENT PRIMARY KEY, Host city VARCHAR, Year INT, Winner VARCHAR, 1st runner up VARCHAR, 2nd runner up VARCHAR)  
SELECT Opponents FROM schedule WHERE Opponent = Stanford